JPH0739981B2 - Method of manufacturing electrode strip for water leak detection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is directed to a leak detection electrode disposed at such a place as to detect a leak in a place that is not normally visible such as under the floor. The present invention relates to a method for manufacturing a belt.

[Conventional technology]

Conventionally, as the water leakage detection electrode band, the one shown in FIGS. 6 and 7 is provided in Japanese Utility Model Publication No. 50-5585.

The water leak detection electrode strip 1 includes an electric wire 2 and a plurality of electrode pairs 5
It consists of and. In the electric wire 2, two core wires 3 and 3'are embedded in a covering material 4 made of a flexible insulating resin. The electrode pair 5 consists of two electrodes 6 and 6 ', and each electrode 6 and 6'makes a notched ">" notch in a rectangular plate and bends the notched part at a right angle. Electrode claws 7 and 7'are formed. The electrodes 6 and 6'are wound around the covering material 4 at a predetermined interval and are fixedly attached thereto.
The electrodes 7 and 7'are pierced into the covering material and brought into contact with the core wires 3 and 3 ', respectively, so that the electrode 6 and the core wire 3 and the electrode 6'and the core wire 3'are electrically connected.

The electrode strip 1 is arranged, for example, under the floor of a water supply part of a house where there is a risk of water leakage, or in a place where water and humidity impair the function of a structure or a device housed therein. , Is fixed to the fixture 8 at a predetermined interval. Also,
The core wires 3 and 3'are connected to a power source and a detection device (not shown).

Therefore, if water leakage or water spillage occurs at the place where the electrode strip 1 is arranged, the electrode pair 6,6 ′ located at the water leaking point comes into contact with water and the two core wires 3,3 ′ are short-circuited. The state is detected by the detection device.

[Problems to be Solved by the Invention]

However, in the electrode strip 1 manufactured as described above, as shown in FIG. 8, when the electrode claws 7 and 7 ′ are bent into the covering material 4 and bent, the electrode claws 7 and 7 ′ are bent. Core wire
Some did not come in contact with 3, 3'at all. In addition, as shown in FIG. 9, the electrode claws 7, 7'slightly make a point contact with the core wires 3, 3 ', but some of them are not electrically connected sufficiently.

For this reason, there has been a problem in that water leakage cannot be reliably detected and reliability is poor.

[Means for Solving the Problems]

Therefore, in the present invention, the electrode (6,6 ') and the core wire (3,3') are used.
The purpose of the present invention is to provide a means for reliably electrically connecting the electrode (6, 6 ') and the core wire (3, 3') to the method for producing a water leak detection oil electrode strip of the present invention. ) Is applied, and then the electrode claws (7, 7 ') and the core wires (3, 3') are brought into contact with each other for welding. The condenser (15)
It is preferred to apply a charge that is charged to the.

[Action]

According to the method for manufacturing the water leakage detecting electrode strip, the electrode claws (7, 7 ') piercing the covering material (4) are exactly the core wires (3,
3 '), an arc is generated between the electrode claw (7,7') and the core wire (3,3 ') at that moment, and the electrode claw (7,7') or the core wire (3,3 '). 3 '), or a part of the electrode claws (7, 7') and the core wires (3, 3 ') are melted and both are electrically connected.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an apparatus for manufacturing a leak detection electrode strip according to the present invention.

In the welding machine 10 of the present manufacturing apparatus, the AC power supply 11 is connected to the transformer 12, and the voltage on the secondary side is adjusted to a predetermined value.
Rectifier 13, resistor 14, capacitor 15, switch on the secondary side
16 are connected in series, and electric charge is stored in the capacitor 15 by turning on the switch 16.

The electrode attachment device 20 includes a body 21 made of a conductive material having a groove portion 22, two bending members 23, 23 arranged on both sides of the groove portion 22 and moving along the upper surface of the body 21, and facing the groove portion 22. It is composed of a pressing member 24 that moves forward and backward.

The electric wire 2 and the electrode claws 6 and 6'are the same as those described in the prior art. Therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The process of manufacturing the leak detection electrode strip will be described with reference to FIGS.

In the welding machine 10, one terminal of the conden 15 is the core wire of the electric wire 2.
3, 3 ', and the other terminal is connected to the main body 21 of the electrode attaching device 20 via the switch 17.

On the other hand, the electrodes 6 and 6'are bent in a U shape as shown in the drawing,
The electrode claws 7, 7'are housed in the main body groove portion 22 with the electrode claws 7, 7 'facing upward.

Next, the switch 16 of the welding machine 10 is turned on to charge the capacitor 15 with electric charge. When charging is completed, the switch 16 turns off. Note that the switch 17 is turned off while the conden 15 is being charged.

Then, the switch 17 is turned on. The pressing member 24 presses the electric wire 4 downward.

As a result, as shown in FIGS. 2 and 3, the electrode claws 7, 7'stab the coating material 4, and the core wires 3, 3'contact the electrode claws 7, 7 '. At this moment, the electric charge charged in the capacitor 15 is the electrode nail.
Electric discharge occurs between 7, 7'and the core wires 3, 3 ', and an arc is instantaneously generated between the contact points of both. Then, this arc melts the electrode claws 7,7 'and the core wires 3,3', or a part of the electrode claws 7,7 'or the core wires 3,3' and is surely connected at the welded portion 8 ( (See FIG. 4).

In addition, since the electric charge charged in the capacitor 15 is instantaneously discharged between the electrode claws 7 and 7'and the core wires 3 and 3 ', the discharge ends in a short time, and the arc is unnecessarily long. It is not formed. Therefore, the melting of the coating material 4 formed of synthetic resin is also minimized.

When welding is completed, the pressing member 24 moves up. Next, the bending members 23, 23 approach from the left and right, and both sides of the electrodes 6, 6 ′ rising from the main body 21 are bent in opposite directions. Subsequently, the bending members 23, 23 are retracted to the left and right, respectively, and the pressing members 24 again press the bent electrodes 6, 6'to generate the electrodes 6, 6 '.
Is securely attached to the electric wire 4.

As described above, attach the electrodes 6 and 6'to the electric wire 4 in sequence,
The water leak detection electrode strip 1 shown in FIG. 1 is formed.

In the above-mentioned embodiment, the electrodes 6 or 6'are attached to the electric wire 2 one by one, but a pair of electrode pairs 5 (6, 6 ') may be attached to the electric wire 2 at a time. In this case, for example, the device shown in FIG. 5 is used.

In this device, the main body 21 of the electrode mounting device 20 is made of a non-conductive material, and conductive portions 25, 25 'are provided at two positions of the groove 22. Also, two welding machines 10, 10 'are prepared, and the terminal of the capacitor 15 in one welding machine 10 is the conductive portion 25 and the core wire 3
Is connected to the condenser 15 'in the other welding machine 10'
Is connected to the conductive portion 25 'and the core wire 3'. 12 'is a transformer, 13' is a rectifier, 14 'is a resistor, 1
6'and 17 'are switches.

Then, the electrodes 6 and 6'are each bent in a U-shape and housed in the electrode portions 25 and 25 ', and the pressing member 24 presses the electric wire 2.
As a result, the electrode claws 7,7 'pierce the covering material 4 of the electric wire 2 and come into contact with the core wires 3,3', and at that moment, the electric charge accumulated in the capacitor 15 is present between the electrode claws 7 and the core wire 3. The electric charge that has been discharged and stored in the capacitor 15 'is the electrode claw 7'and the core wire 3'.
Between them, and each is welded and electrically connected. Opening / closing operations of the switches 16, 17 and 16 ', 17' are performed in the same manner as in the above embodiment.

As described above, according to this embodiment, the electrodes 6 and 6'can be attached to the electric wire 2 for each electrode pair 5, so that the electrode strip 1 can be efficiently manufactured.

(Effects of the Invention) As is clear from the above description, in the method for manufacturing a water leak detection electrode strip according to the present invention, two core wires embedded in a covering material made of an insulating resin and the covering material are provided. Electric charges are applied to the electrode claws of the electrodes to be attached, and an arc is formed between the electrode claws at the moment when the electrode claws contact the core wire so that they are welded.

Therefore, the electrode claw or the core wire, the contact part between the electrode claw and the core wire, or the closest portion of both are melted, and these are reliably electrically connected.

For this reason, it is possible to reliably detect and notify of water leakage by the water leakage detection electrode band.

Further, if the electric charge accumulated in the capacitor is instantaneously discharged to weld the electrode claw and the core wire, damage to the covering material can be minimized.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a manufacturing apparatus for a water leak detection electrode band,
2 to 4 are cross-sectional views showing the manufacturing process of the water leakage detection electrode band, FIG. 5 is a view showing a second embodiment of the apparatus for manufacturing the water leakage detection electrode band, and FIG. 6 is a water leakage detection electrode. FIG. 7 is a plan view of the strip, and FIGS. 7 to 9 are cross-sectional views of a conventional water leakage detection electrode strip. 1 ... Water leakage detection electrode band, 2 ... Electric wire, 3,3 '... Core wire, 4 ... Coating material, 5 ... Electrode pair, 6,6' ... Electrode, 7,
7 '... Electrode claw, 8 ... Weld, 10 ... Welder, 15 ...
Capacitor, 20 ... Electrode mounting device.

Claims (2)

[Claims] 1. A plurality of electrode pairs are attached to an electric wire in which two core wires are covered with a covering material made of an insulating resin, and two electrodes forming the electrode pair are provided with electrode claws provided on the electrodes. In the method of manufacturing a water leakage detecting electrode strip which pierces a covering material and is electrically connected to each core wire, an electric charge is applied to each of the electrode and the core wire, and thereafter, the electrode claw and the core wire are brought into contact with each other. A method of manufacturing an electrode strip for detecting water leakage, which comprises welding. 2. The method for manufacturing an electrode strip for water leakage detection according to claim 1, wherein the electric charge is applied from a capacitor.